dome vs whispering dome

dome and whispering dome both are nouns.

Word	Noun	Adjective	Verb	Adverb
dome	Yes	No	No	No
whispering dome	Yes	No	No	No

As nouns, whispering dome is a hyponym of dome; that is, whispering dome is a word with a more specific, narrower meaning than dome:

dome: a hemispherical roof
whispering dome: a space beneath a dome or arch in which sounds produced at certain points are clearly audible at certain distant points

Other hyponyms of dome include astrodome, cupola, geodesic dome, onion dome, pressure dome, whispering gallery.

dome (noun)	whispering dome (noun)
a hemispherical roof	a space beneath a dome or arch in which sounds produced at certain points are clearly audible at certain distant points
a stadium that has a roof
informal terms for a human head
a concave shape whose distinguishing characteristic is that the concavity faces downward